The difference between speed and velocity is thata) speed is a vector and requires direction. b) speed is a vector and requires a magnitude. c) velocity is a vector and requires a direction. d) velocity is a vector and requires a magnitude.

Hello,

The answer here would be C

Answer A is wrong, speed does not direction.

Answer B is wrong, Speed is not a vector.

So I would say Answer C is the correct answer.

Hope this helps.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

you can cut your hand off if your not